278 lines
9.9 KiB
Java
278 lines
9.9 KiB
Java
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/*
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* VersionRegistry.java
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*/
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package netscape.softupdate ;
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import java.util.Enumeration;
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import java.util.NoSuchElementException;
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/**
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* The VersionRegistry class is a set of static functions that form a wrapper
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* around the Navigator's built-in Version Registry. The Version Registry
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* represents a hierarchical tree of Navigator "components". Each component
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* represents a physical file installed on the disk or a logical grouping of
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* other components (e.g. Java). All components should have an associated
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* version used to determine when an update is necessary; components that
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* represent a physical file will also have the disk location of the file.<p>
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*
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* Component names passed as arguments can be specified as full paths from
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* the VersionRegistry root, or as paths relative to the most recently
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* run version of the Navigator. 3rd-party add-ons that work with
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* multiple versions of Navigator will probably want to start their
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* own sub-tree under the root, independent of the components for the
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* Navigator itself.<p>
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*
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* Because this class is intended to be called from JavaScript in addition
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* to Java, errors are indicated through return values rather than exceptions.
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*
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* It is not yet determined if this class will be public for generic use, or
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* only available through the Automatic Software Download feature.
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*
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* @version 1.0 96/11/16
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* @author Daniel Veditz
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*/
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final class VersionRegistry implements RegistryErrors {
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/**
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* This class is simply static function wrappers; don't "new" one
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*/
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private VersionRegistry() {}
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/**
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* Return the physical disk path for the specified component.
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* @param component Registry path of the item to look up in the Registry
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* @return The disk path for the specified component; NULL indicates error
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* @see VersionRegistry#checkComponent
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*/
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protected static native String componentPath( String component );
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/**
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* Return the version information for the specified component.
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* @param component Registry path of the item to look up in the Registry
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* @return A VersionInfo object for the specified component; NULL indicates error
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* @see VersionRegistry#checkComponent
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*/
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protected static native VersionInfo componentVersion( String component );
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protected static native String getDefaultDirectory( String component );
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protected static native int setDefaultDirectory( String component, String directory );
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protected static native int installComponent( String name, String path,
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VersionInfo version );
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protected static int installComponent( String name, String path,
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VersionInfo version, int refCount )
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{
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int err = installComponent( name, path, version );
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if ( err == REGERR_OK )
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err = setRefCount( name, refCount );
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return err;
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}
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/**
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* Delete component.
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* @param component Registry path of the item to delete
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* @return Error code
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*/
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protected static native int deleteComponent( String component );
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/**
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* Check the status of a named components.
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* @param component Registry path of the item to check
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* @return Error code. REGERR_OK means the named component was found in
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* the registry, the filepath referred to an existing file, and the
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* checksum matched the physical file. Other error codes can be used to
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* distinguish which of the above was not true.
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*/
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protected static native int validateComponent( String component );
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/**
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* verify that the named component is in the registry (light-weight
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* version of validateComponent since it does no disk access).
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* @param component Registry path of the item to verify
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* @return Error code. REGERR_OK means it is in the registry.
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* REGERR_NOFIND will usually be the result otherwise.
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*/
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protected static native int inRegistry( String component );
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/**
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* Closes the registry file.
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* @return Error code
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*/
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protected static native int close();
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/**
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* Returns an enumeration of the Version Registry contents. Use the
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* enumeration methods of the returned object to fetch individual
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* elements sequentially.
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*/
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protected static Enumeration elements() {
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return new VerRegEnumerator();
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}
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/**
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* Set the refcount of a named component.
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* @param component Registry path of the item to check
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* @param refcount value to be set
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* @return Error code
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*/
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protected static native int setRefCount( String component, int refcount );
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/**
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* Return the refcount of a named component.
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* @param component Registry path of the item to check
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* @return the value of refCount
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*/
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protected static native Integer getRefCount( String component );
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/**
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* Creates a node for the item in the Uninstall list.
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* @param regPackageName Registry name of the package we are installing
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* @return userPackagename User-readable package name
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* @return Error code
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*/
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protected static int uninstallCreate( String regPackageName, String userPackageName )
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{
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String temp = convertPackageName(regPackageName);
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regPackageName = temp;
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return uninstallCreateNode(regPackageName, userPackageName);
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}
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protected static native int uninstallCreateNode( String regPackageName, String userPackageName );
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/**
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* Replaces all '/' with '_',in the given string.If an '_' already exists in the
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* given string, it is escaped by adding another '_' to it.
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* @param regPackageName Registry name of the package we are installing
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* @return modified String
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*/
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private static String convertPackageName( String regPackageName )
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{
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String tempStr = regPackageName;
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String convertedPackageName;
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boolean bSharedUninstall = false;
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if (regPackageName.startsWith("/"))
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bSharedUninstall = true;
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int index = tempStr.indexOf('_');
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while (index != -1)
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{
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StringBuffer temp = new StringBuffer(tempStr);
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temp.insert(index + 1, '_');
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tempStr = temp.toString();
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index = tempStr.indexOf('_', index + 2);
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}
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convertedPackageName = tempStr.replace('/', '_');
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if (bSharedUninstall)
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{
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StringBuffer temp = new StringBuffer(convertedPackageName);
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temp.setCharAt(0, '/');
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convertedPackageName = temp.toString();
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}
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return convertedPackageName;
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}
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/**
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* Adds the file as a property of the Shared Files node under the appropriate
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* packageName node in the Uninstall list.
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* @param regPackageName Registry name of the package installed
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* @param vrName registry name of the shared file
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* @return Error code
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*/
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protected static int uninstallAddFile( String regPackageName, String vrName )
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{
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String temp = convertPackageName(regPackageName);
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regPackageName = temp;
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return uninstallAddFileToList(regPackageName, vrName);
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}
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protected static native int uninstallAddFileToList( String regPackageName, String vrName );
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/**
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* Checks if the shared file exists in the uninstall list of the package
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* @param regPackageName Registry name of the package installed
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* @param vrName registry name of the shared file
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* @return true or false
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*/
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protected static int uninstallFileExists( String regPackageName, String vrName )
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{
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String temp = convertPackageName(regPackageName);
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regPackageName = temp;
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return uninstallFileExistsInList(regPackageName, vrName);
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}
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protected static native int uninstallFileExistsInList( String regPackageName, String vrName );
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}
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/**
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* Helper class used to enumerate the Version Registry
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* @see VersionRegistry#elements
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*/
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final class VerRegEnumerator implements Enumeration {
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private String path = "";
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private int state = 0;
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public boolean hasMoreElements() {
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int saveState = state;
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String tmp = regNext();
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state = saveState;
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return (tmp != null);
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}
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public Object nextElement() {
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path = regNext();
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if (path == null) {
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throw new NoSuchElementException("VerRegEnumerator");
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}
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return "/"+path;
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}
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private native String regNext();
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}
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